I was surprised that at one sweat shop they didn't even track buy-ins. Then it occurred to me they just track the play of anyone that colors up for a lot of chips to determine the buy-in and profit/loss for the session. You can bet they look for a skill level at the same time. The place is notorious for back offs upon your return after your first visit. Now I understand why. Just never buy-in for much or don't play there. Large cumulative buy-ins expose you for having deep pockets. If they see you as skilled this makes you a threat. But if they see you as a sucker then they want you there playing.